Denver Tech Center Frontline Source Group - Temporary Staffing Agency and Direct Hire Staffing Firm in the Denver Tech Center area of Colorado. Frontline Source Group is one of the fastest growing Staffing agencies for Technical Services Information, Technology, Accounting, Finance, Human Resource, Administrative, Clerical, Oil Gas Energy, and Healthcare Medical office employment staffing. Frontline specializes in matching top talented professional candidates with companies for Temporary, Temp to Hire, Temp Contract, Temporary Staffing Services, Contract Projects and Direct Hire placement positions. We service short term, long term, or project based staffing requirements. Frontline works with clients and candidates in all areas of North America and the Denver Tech Center.